On Aug 5, 2009, at 2:58 PM, Brian Kolaci wrote:
I'm chiming in late, but have a mission critical need of this as
well and posted as a non-member before. My customer was wondering
when this would make it into Solaris 10. Their complete adoption
depends on it.
I have a customer that is trying to move from VxVM/VxFS to ZFS,
however they have this same need. They want to save money and move
to ZFS. They are charged by a separate group for their SAN storage
needs. The business group storage needs grow and shrink over time,
as it has done for years. They've been on E25K's and other high
power boxes with VxVM/VxFS as their encapsulated root disk for over
a decade. They are/were a big Veritas shop. They rarely ever use
UFS, especially in production.
They absolutely require the shrink functionality to completely move
off VxVM/VxFS to ZFS, and we're talking $$millions. I think your
statements below are from a technology standpoint, not a business
standpoint.
If you look at it from Sun's business perspective, ZFS is $$ free, so
Sun gains
no $$ millions by replacing VxFS. Indeed, if the customer purchases VxFS
from Sun, it makes little sense for Sun to eliminate a revenue source.
OTOH,
I'm sure if they are willing to give Sun $$ millions, it can help
raise the
priority of CR 4852783.
http://bugs.opensolaris.org/view_bug.do?bug_id=4852783
You say its poor planning, which is way off the mark. Business
needs change daily. It takes several weeks to provision SAN with
all the approvals, etc. and it it takes massive planning. That goes
for increasing as well as decreasing their storage needs.
I think you've identified the real business problem. A shrink feature
in ZFS will
do nothing to fix this. A business who's needs change faster than
their ability
to react has (as we say in business school) an unsustainable business
model.
-- richard
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